List Rules Upvote the scariest and weirdest things you didn't know about the many amazing creatures who live in the oceans.

We all wonder what alien life might look like, but there are some strange creatures swimming in our oceans that are more bizarre than anything Hollywood has imagined. About 71 percent of the surface of the Earth is covered in water and we are still only beginning to discover the incredible biodiversity and unusual denizens of the oceans. Ocean life and sea animals are full of surprises, and there are all kinds of cool fish (and a few scary ones) living in the ocean.

What fascinating fish facts should you know about the many creatures of the ocean depths? Did you know that until 2013, no one had ever recorded a video of a giant squid alive? The coelacanth was thought to be extinct for millions of years until one was caught alive in 1938. There are also an array of alien-like jellyfish and terrifying deep-sea monsters that look like something out of a horror movie.

So what is the weirdest, wildest ocean creature alive? Believe it or not, all the ocean animals and fish below are 100% real. Vote up the most interesting and maybe slightly scary facts about ocean life below!

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The Freaky Barreleye Has a Transparent Head

Photo: Monterey Bay Aquarium Research Institute

There are a lot of strange-looking creatures in the ocean, but the barreleye has to be one of the freakiest. It has a transparent head, with large eyes inside that look upward. For looking down, the barreleye also has a small set of eyes on the bottom of its body,

The Atolla Jellyfish Might As Well Be an Alien

If it looks like an alien and acts like an alien, is it an alien? The UFO-looking atolla jellyfish, like most jellyfish, has no digestive, respiratory, circulatory, or central nervous system. It also has a biological protective “burglar alarm” display visible from 300 feet away.

Octopuses Can See with Their Skin

An octopus can change its coloring to match its surroundings. Although its big eyes help, recent research suggests that there is a protein in the octopus's skin that is light sensitive, suggesting these cephalopods can see without using their peepers.

The Vampire Squid Can Turn Itself Inside Out

Squid are already alien-like creatures with their tentacles, huge eyes, and ability to flash colors. The vampire squid takes things one step further: it can turn itself inside out to use its cape webbing as a shield.

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